The Pittsburgh Penguins have the most power-play goals by a team in a season, with 342 points in 1988-89.

which team had the most power play points in a season

TEAM	PPP	SEASON	GP	W	L	T	OTL	PTS	PTS%	G	GA	PP%	PK%	S/GP	SA/GP
Pittsburgh Penguins	342	1988-89	80	40	33	7		87	.544	347	349	24.5	77.0	28.51	35.70
Detroit Red Wings	331	1992-93	84	47	28	9		103	.613	369	280	24.9	81.2	32.92	28.87
Pittsburgh Penguins	322	1995-96	82	49	29	4		102	.622	362	284	26.0	83.3	32.26	34.63
New York Rangers	317	1987-88	80	36	34	10		82	.513	300	283	22.6	80.6	31.76	30.48
Calgary Flames	317	1987-88	80	48	23	9		105	.656	397	305	28.5	80.4	33.33	29.65
Pittsburgh Penguins	316	1987-88	80	36	35	9		81	.506	319	316	22.0	76.4	31.30	31.05
Winnipeg Jets	316	1987-88	80	33	36	11		77	.481	292	310	25.5	78.8	31.39	29.84
Toronto Maple Leafs	313	2005-06	82	41	33		8	90	.549	254	263	21.4	80.0	28.33	30.60
Pittsburgh Penguins	308	1992-93	84	56	21	7		119	.708	367	268	23.9	83.2	32.44	30.73
Detroit Red Wings	298	2005-06	82	58	16		8	124	.756	301	206	22.1	85.5	34.10	26.59
Los Angeles Kings	297	1992-93	84	39	35	10		88	.524	338	340	20.1	78.4	33.99	34.38
Ottawa Senators	296	2005-06	82	52	21		9	113	.689	312	205	20.8	84.7	34.28	28.59
Buffalo Sabres	294	2005-06	82	52	24		6	110	.671	276	234	21.2	86.6	30.61	30.51
Quebec Nordiques	293	1992-93	84	47	27	10		104	.619	351	300	21.8	80.6	29.99	30.32
Buffalo Sabres	292	1991-92	80	31	37	12		74	.463	289	299	22.5	78.5	32.50	32.25
New York Rangers	292	1989-90	80	36	31	13		85	.531	279	267	23.3	78.7	29.81	30.04
Calgary Flames	291	1988-89	80	54	17	9		117	.731	354	226	25.2	82.8	34.64	25.74
Quebec Nordiques	291	1987-88	80	32	43	5		69	.431	271	306	21.7	76.6	29.88	29.04
Calgary Flames	290	1989-90	80	42	23	15		99	.619	348	265	27.7	79.2	34.35	25.34
Los Angeles Kings	290	1987-88	80	30	42	8		68	.425	318	359	21.7	77.4	30.75	32.11
Quebec Nordiques	288	1985-86	80	43	31	6		92	.575	330	289	23.6	81.3	32.35	29.94
Toronto Maple Leafs	287	1992-93	84	44	29	11		99	.589	288	241	21.0	82.4	30.37	29.05
Atlanta Thrashers	286	2005-06	82	41	33		8	90	.549	276	270	18.9	79.2	30.76	30.28
Chicago Blackhawks	283	1987-88	80	30	41	9		69	.431	284	328	23.0	80.2	29.34	35.67
Philadelphia Flyers	282	1988-89	80	36	36	8		80	.500	307	285	26.7	81.5	29.86	30.55